What size choke is this actually

derk22

derk22

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Hello,

I recently learned there is more chokes out there then cyl, imp cyl, mod, full.

So I decided to measure my full choke to see where it would be.... Now I'm lost.

Here's the info
Browning auto 5, 12ga magnum ventrib special steel-3" * (* meaning full choke for browning)
Barrel length is 32" gun made in 71

So I used my cailipers and got 0.675

I looked to google and read that that's a super tight turkey choke.

Was Google correct? Is this tighter then full?
 
Yup, turkey choke. Its a little tighter than full. Its also likely that your caliper is reading slightly tighter than it actually is.
 
It is Euro FULL. Most guns built on the Continent were super FULL when marked FULL. Remember choke diameter does not mean a lot unless you have the bore diameter to compare. But your gun is choked tight by North American FULL choke standards.

Darryl
 
So this is probably not the duck gun I was hoping for. I was hoping it was closer to a modified ... But that went the other way
 
No, no, no.

The ONLY way to tell for sure what you have for choke is to measure the inside diameter of your barrel before the choke.

If your barrel measures 0.695, then you have 20 points of choke,
If your barrel measures 0.700, then you have 25 points of choke
If your barrel measures 0.690, then you have 15 points of choke
If your barrel measures 0.685, then you have 10 points of choke,
ad nauseum.

Never mind that 12 gauge bores are supposed to be 0.729-0.730".

Measure yours.
 
^Okay

So I use my calipers and measure the back end, reply with that and you will be able to tell me how many points that is?
And how this points system works?
 
Thousands of Browning bores were measured in the 50's and 60's by Jack O'Connor. He determined that the average inner bore diameter on Belgian built 12 gauge Browning shotguns was .725. The average FULL choke was .687. This leaves .038 points of constriction. Of course if you want to use your gun for duck hunting you can do two things, buy soft no tox shot loads (waaaaaay expensive) or have a decent smith measure your inner bore diameter and then open the choke to modified dimension. The fact that your gun is a Magnum 12 I would open it a little more than Modified, say Skeet 2 (also known as Light Modified) to be safe with the larger steel shot sizes BB and the heavier payload in the 3" chambering. Like I said O'Connor's stats were averages but your numbers look like your gun has been untouched and is indeed a factory Full choke in the Browning gun.

Darryl
 
Yea its no duck gun. Run steel through that thing and you're going to bulge the barrel. You can take it to a smith and they can ream it out to a modified choke. The cost isn't that bad. Lots of people do it if they get a gun passed down to them by their grandparents but they want to use it.
 
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